实用医学杂志 ›› 2024, Vol. 40 ›› Issue (4): 453-459.doi: 10.3969/j.issn.1006-5725.2024.04.003

• 专题报道:抑郁症 • 上一篇    下一篇

miR-421靶向调控Menin/Caspase-3影响抑郁症的机制

刘永辉1,谭庆晶1,陈清1,韦理萍2,杨俊威1,杨侃3,高玉广4()   

  1. 1.广西中医药大学第一附属医院,脑病科,(南宁 530023 )
    2.广西中医药大学第一附属医院,康复科,(南宁 530023 )
    3.广西中医药大学第一附属医院,急诊科,(南宁 530023 )
    3.广西中医药大学 (南宁 530001 )
  • 收稿日期:2023-04-09 出版日期:2024-02-25 发布日期:2024-03-08
  • 通讯作者: 高玉广 E-mail:stone_304@126.com
  • 基金资助:
    广西自然科学基金面上项目(2020GXNSFAA297161);第七批全国老中医专家学术经验继承工作(国中医药人教函〔2022〕76号);广西中医临床优秀人才项目(桂中医药科教发[2022]14号);刘泰广西名中医传承工作室建设项目(桂中医药科教发[2021]6号)

The mechanism of target regulating of miR⁃421 to Menin/Caspase⁃3 pathway for depression

Yonghui LIU1,Qingjing TAN1,Qing CHEN1,Liping WEI2,Junwei YANG1,Kan YANG3,Yuguang. GAO4()   

  1. *.Department of Neurology,First Affiliated Hospital of Guangxi University of Chinese Medicine,Nanning 530023,China
  • Received:2023-04-09 Online:2024-02-25 Published:2024-03-08
  • Contact: Yuguang. GAO E-mail:stone_304@126.com

摘要:

目的 探讨miR-421影响抑郁症发生发展的作用机制。 方法 采取单次腹腔注射脂多糖(LPS)方法建立抑郁大鼠模型,采用糖水偏好度测试和旷场实验进行抑郁行为检测。通过miRNA微阵列芯片和RT-PCR分析miR-421在抑郁大鼠海马组织中的表达量,运用TargetScan数据库和mi RDB数据库进行预测miR-421的靶基因,采用双荧光素酶报告基因实验观察其与靶基因的结合情况,观察过表达和抑制miR-421对靶基因的影响,随后过表达和抑制靶基因,观察其对下游因子的影响,最终探究miR-421影响抑郁症的相关机制。 结果 miRNA微阵列芯片和RT‐PCR检测表明miR-421在抑郁大鼠海马组织中呈高表达(P < 0.001),抑制miR-421的表达可显著恢复抑郁大鼠的体重和运动能力(P < 0.001)。TargetScan数据库预测得到Menin与miR-421存在结合靶点,双荧光素酶报告基因实验表明Menin与miR-421具有相互作用;当miR-421过表达时,Menin表达量会下调(P < 0.001),相反,当抑制miR-421表达时,Menin表达量会上调(P < 0.001)。qPCR检测提示,Menin下游因子Caspase-3、NF-κB在抑郁大鼠模型海马组织中的表达显著提高(P < 0.001),IL-1β在抑郁大鼠模型海马组织中的表达明显提高(P < 0.01),当抑制Menin表达时,Caspase-3、NF-κB、IL-1β表达量会升高(P < 0.001),当过表达Menin时,Caspase-3、NF-κB、IL-1β表达量则降低(P < 0.001)。 结论 抑制miR-421表达可升高Menin表达,降低Caspase-3含量,减少神经炎症反应,从而改善抑郁症状。

关键词: 抑郁症, miR-421, Menin, Caspase-3, 动物实验, 作用机制

Abstract:

Objective To explore the mechanism of miR-421 affecting the occurrence and development of depression. Methods A depressive rat model was established by single intraperitoneal injection of lipopolysaccharide (LPS), and depressive behavior was detected by glucose preference test and open-field test. miRNA microarray chips and RT-PCR were used to analyze the expression level of miR-421 in hippocampus of the depressed rats. TargetScan database and mi RDB database were used to predict the target genes of miR-421. Dual luciferase reporter gene assay was used to observe the binding of miR-421 to the target genes. The impact of over-expression and inhibition of miR-421 on target genes was observed, then the influence of over-expression and inhibition of target genes on downstream factors was observed, and the related mechanism of miR-421 on depression was explored. Results miRNA microarray chips and RT-PCR assay showed that miR-421 was highly expressed in the hippocampus of the depressed rats (P < 0.001), Inhibition of miR-421 expression could significantly restore the body weight and exercise ability of the depressed rats (P < 0.001). Binding targets of Menin and miR-421 were predicted by TargetScan database, and interaction between Menin and miR-421 was demonstrated by dual-luciferase reporter gene assay. Menin expression was down-regulated while miR-421 was overexpressed (P < 0.001), whereas it was up-regulated as miR-421 was inhibited (P < 0.001). qPCR indicated that expressions of Caspase-3 and NF-κB in the hippocampus of the depressed rats was significantly increased (P < 0.001), and IL-1β expression in the hippocampus was significantly increased (P < 0.01). When the expression of Menin was inhibited, the expressions of Caspase-3, NF-κB and IL-1β were increased (P < 0.001), while the expressions of Caspase-3, NF-κB and IL-1β were decreased when Menin was overexpressed (P < 0.001). Conclusions Inhibition of miR-421 expression can increase Menin expression, decrease Caspase-3 content, and reduce neuroinflammatory response, thereby improving depressive symptoms.

Key words: depression, miR-421, menin, caspase 3, animal experiments, mechanism

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